Use while loop when you couldn’t know how many time it loops
while <loop condition>
<actions to be executed with each loop>
When the loop condition’s value is true, actions to be executed with each loop will be executed again and again. If the loop condition’s value is false, the loop stop, and program continue pass this structure.
Ex: Find all Bob in an array, which is a names list.
$list : [“Annie”,”Bob”, “Bob”, “Sabrina”]
$i : 1
@echo “Positions of Bob in list:\n”
while $i <= 4
if $list[$i] = Bob:
@echo $i + “\n”
$i++
> Positions of Bob in list:
> 2
> 3
Note: You should double check the loop condition to avoid a indefinite loop.